The shocking video showed Xiao repeatedly striking his patient after he became agitated while having his diaper changed. While holding his arms together with one hand, he repeatedly hit the terrified grandfather 11 times in the head.

Jie Xiao was arrested and charged with assault on June 27 after video of the May 8 attack was handed to police.

Karam’s grandson, Daniel Nassrallah, said he couldn’t believe what he was seeing when he first viewed the video.

'I literally stood up and fell down, my legs gave way because I didn’t know how to respond to this,' he said.

'We have a camera on him, and even that doesn’t deter him. To me, that’s mind blowing.'